Lan's hanging can grow up, and the general body shape of Lan's hanging can grow to about 18cm, and the body shape tends to be oval. The staple food is seagrass and algae-eating fish. Grows in coral reef areas and some coastal areas, generally in groups.

Blue The whole fish is yellow, and there are many brown worms on the sides and head.The body of the bluefish is oval in length and oval in shape. Flat side. The head is small and the profile of the back of the head is not particularly prominent. The mouth is small, end position, with a row of flat teeth in the upper and lower jaws, the teeth are fixed and immovable, and the tooth margins are notched. The spines of the dorsal and anal fins are sharp, the rays are not elongated, the pectoral fins are nearly triangular, and the caudal fins are nearly truncate or concave. The body is uniformly yellow, with many brown worms on the body and head, the pelvic fins are dark brown with white margins, the pectoral fins are pale yellow and transparent, the remaining fins are the same color as the body, and the tail spines are brown.